JPS6350237Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power tilt device for a propulsion unit installed outside a boat in an inboard/outboard motor.

In an inboard/outboard motor, a propulsion unit placed outside the boat is stored in an upwardly tilted state when not in use. On the other hand, when sailing, the propulsion machine stored in this way is lowered downward, but in this case, when the clutch is returned from forward to neutral during sailing, the propulsion machine is moved by the inertia of the hull. In manual type models, the astern lever on the propulsion machine side is locked to the thrust rod on the hull side to provide a neutral lock to prevent such a jump, and the propulsion machine is When the vehicle collides with an obstacle, the astern lever and the thrust rod are disengaged and the propulsion device is tilted up to prevent damage. Therefore, the propulsion unit's tilt-up mechanism has two functions: tilt-up during storage and tilt-up during collision, and also has a neutral lock function to prevent jumping when switching to neutral during navigation. It is necessary to do so.

FIG. 1 shows an example of a conventional power tilt device. In this conventional example, a propulsion device 1 is supported so as to be tiltable in the front and rear directions about a fulcrum 2, and a power cylinder 3
The tip of the rod is connected to the propulsion unit 1, and when it is stored, the propulsion unit 1 is tilted backward by the power cylinder 3, while the neutral lock is performed by the power cylinder 3, and the propulsion unit 1 is When the aircraft 1 collides with an obstacle, the hydraulic pressure of the power cylinder 3 is released to allow the propulsion unit 1 to tilt up. There is a drawback that sometimes it is not possible to follow up quickly, and therefore the protection of the propulsion machine is not sufficient. On the other hand, FIG. 2 shows another conventional example, in which a longitudinal power cylinder 3, which is arranged to protrude slightly diagonally rearward from the hull 5, is connected to one location of a tilt plate 6, which is also pivoted on the hull 5 side. The propulsion unit 1 is configured to push up the tilt plate 6 from below, and the propulsion unit 1 is engaged with a thrust rod 7 which is also attached to the tilt plate 6. Tilt up during storage is performed via the tilt plate 6 and thrust rod 7. ,On the other hand, in the case of a collision,
When the thrust rod 7 is disengaged from the thrust rod 7, only the propulsion device 1 is tilted up. In such a structure, tilt-up in the event of a collision occurs independently of hydraulic pressure, and therefore,
Although it has the advantage of not having the disadvantages shown in Fig. 1, the tilt plate 6 and the thrust rod 7 are integrated, so the structure of the conventional manual type with the thrust rod 7 attached to the hull side can be used. This has the drawback of not being able to do this, resulting in high costs.

The present invention eliminates these conventional drawbacks, allows quick tilt-up operation in the event of a collision, and allows the structure of the conventional manual type to be used almost as is, making it possible to do so at low cost. be.

Hereinafter, the configuration of the present invention will be explained based on an illustrated embodiment, but before that, it is necessary to explain the structure of a manual tilt-up device in which the present invention is used.
Since it is considered useful for understanding this idea,
This will be explained based on FIG.

Therefore, in FIG. 3, reference numeral 11 denotes a transom plate fixed to the rear surface of the transom 12a of the hull 12, and a hanging bracket 13 protruding from the middle part of the transom plate 11 in the vertical direction is attached to the tip of the suspension bracket 13, approximately in the middle of the hull in the vertical direction. The upper end of a swivel fork 15 is pivotally connected via a bearing 14 located at , and as is well known, the propulsion device 16 is supported on the lower end of this swivel fork 15 so as to be able to swing left and right. On the other hand, 17 is a thrust bracket that similarly protrudes rearward from the lower end of the transom plate 11, and a left-right thrust rod (18 includes an astern lever 19 that protrudes forward from the swivel fork 15) is attached to the rear end of the thrust bracket 17. Tilt-up during storage and during a collision is performed by disengaging the thrust rod 18 and the astern lever 19.

Now, in the present invention, the manual tilt-up device as described above is configured as shown in FIGS. 4 and 5 to perform power tilt-up during storage.

That is, as shown in FIG. 5, the transom 12
A pair of hanging stands 20 are fixed with bolts 21 near the upper end of a, and a pair of left and right hydraulic power cylinders 2 arranged downward are attached to the hanging stands 20.
2 has a fulcrum pin 23 at its bottom end.
It is pivotally connected and suspended so that it can swing back and forth. Note that FIG. 5 shows only the left half of the device, and the omitted right half has the same structure and is symmetrical to the left half.

14 is a bearing pin that supports the swivel fork 15, and this bearing pin 14 is
It is inserted into the rear end of a hanging bracket 13 that protrudes rearward from the transom plate 11 in the left-right direction. On the other hand, the swivel fork 15, as shown in FIG. It is supported so that it can swing freely in the direction.

Next, reference numeral 24 denotes a pair of left and right tilt brackets formed in an L-shape, as shown in FIG. It is rotatably pivoted to the outer end, and one end 24a thereof protrudes forward and is pivoted to the tip of the rod 22a of the power cylinder 22.
On the other hand, the other end 24b of the tilt bracket 24 protrudes toward the back side of the swivel fork 15, and between the pair of left and right other ends 24b that protrude in this way, as shown in FIG. 5, there is a push-up portion of the present invention. A tilt rod 25 is constructed, and this tilt rod 25
is located on the back of Swivel Fork 15. The tilt rod 25 may be formed integrally with the tilt bracket 24, or the other end 24b of the tilt bracket 24 may be similarly bent inward so that the tilt rod 25 is not used.

The astern lever 19 is pivoted to the protrusion 15a at the lower end of the swivel fork 15 via a support shaft 26 so as to be vertically movable. By means of a spring 28 that engages the thrust rod 18 of 17 and is also provided between the astern lever 19 and the swivel fork 15,
The astern lever 19 and the thrust rod 18 are always energized to be engaged.

In the above configuration, when hydraulic pressure is supplied to the power cylinder 22 and the rod 22a is extended, the rod 22a pushes down and rotates one end 24a of the tilt bracket 24 downward about the bearing pin 14. Since the tilt rod 25 at the other end 24b of the tilt bracket 24 comes into contact with the back surface of the swivel fork 15 and attempts to rotate the swivel fork 15 backward, this force causes the astern lever 19 to move against the spring 2.
8 and thrust rod 18.
The propulsion unit 16, together with the swivel fork 15, is tilted and rotated independently of the power cylinder 22 and the tilt bracket 24, and is thus freed from damage.

As described above, according to the present invention, tilt-up during storage can be performed by hydraulic operation, so even if tilt-up is difficult due to heavy propulsion equipment or hull shape, tilt-up can be easily done by remote control. Not only can this be done, but the following remarkable effects can also be obtained.

Since the tilt bracket only comes into contact with the back side of the swivel fork of the propulsion machine, the swivel fork and the propulsion machine can tilt up independently of the power cylinder in the event of a collision, thus releasing the hydraulic pressure in the event of a collision. This eliminates the need for rapid tilt-up, and prevents damage to the propulsion machine due to tilt-up delays.

The thrust rod can be attached to the hull side as before, so the conventional structure can be used as is, and there is no need to connect the swivel fork and tilt bracket, so the conventional structure can be used as is.

In this case, the present invention involves pushing up and rotating the swivel fork that supports the propulsion unit so that it can swing freely, and the structure of a conventional inboard/outboard motor in which the propulsion unit is supported so that it can swing freely by means of a swivel fork can be used as is.

Since the tilt bracket is attached to the bearing pin that supports the swivel fork, there is no need to provide a special support part for the tilt bracket, and in order to make it a manual type, it is only necessary to remove this tilt bracket. In combination with this, it can be used in combination with a manual type and can be implemented at low cost.

A power cylinder and a tilt bracket are additionally equipped to the conventional structure, and the tilt bracket does not need to be connected to the propulsion device in any way, and can be implemented at a simple structure and at low cost.

The power cinder is located on the outside of the hull,
Therefore, there is no need to form an opening in the transom to connect the power cylinder and the tilt bracket, and since the power cylinder is installed vertically and at a higher position than the bearing pin, the problem of salt damage can be avoided. There is less risk of this occurring, and maintenance is also easier. In other words, in this structure in which the propulsion unit is supported via a bearing pin located midway in the vertical direction of the hull, the position of this bearing pin is approximately at the seawater level, but the power cylinder is located at the seawater level. Because it is located higher up,
This can solve salt damage problems and maintenance problems. In short, this structure eliminates the need for the power cylinder to be located outside the boat and to provide an opening as described above, while also solving the problems of salt damage and maintenance.

The above-mentioned power cylinder is suspended and supported at one end so as to be able to swing forward and backward toward the hull side, and the other end is pivotally attached to a rotatable tilt bracket, so that during tilting operation, the power cylinder is suspended from the tilt bracket. The rod swings in accordance with the rotational movement of the tip, no bending moment is applied to the power cylinder, and the rigidity of the rod is increased, so there is no drawback that the rod becomes larger or more expensive.

[Brief explanation of the drawing]

1 and 2 are schematic side views showing a conventional example, FIG. 3 is a side view showing a conventional manual tilt-up structure, FIG. 4 is a side view of essential parts showing an embodiment of the present invention, and FIG. The figure is also a front view seen from the rear, No. 6
The figure is an enlarged view of the main part of FIG. 4. 12...hull, 12a...transom, 14...
...bearing pin, 15...swivel fork,
16... Propulsion machine, 22... Power cylinder, 22
a... Power cylinder rod, 24... Tilt bracket, 24a... One end of the tilt bracket, 24b... Other end of the tilt bracket, 25...
…Tiltrod.

Claims (1)

[Scope of utility model registration request] In an inboard/outboard motor, a swivel fork is pivotally mounted on the outside of the hull so as to be swingable in the front and rear directions, and a propulsion unit is pivotally mounted to the swivel fork so as to be swingable in the left and right directions, and the swivel fork is pivotably mounted and the hull A tilt bracket is pivotally attached to a bearing pin located in the middle of the vertical direction, and the tip of the rod on the rocking side of the power cylinder, which is suspended and supported on the hull side so as to be able to swing back and forth, is attached to one end of the tilt bracket. The power cylinder is vertically supported on the outside of the hull and placed at a higher position than the bearing pin, and the other end of the tilt bracket is attached to the rear side of the swivel fork. A power tilt device for a propulsion device in an inboard/outboard motor, wherein the tilt bracket projects upward and the other end side of the tilt bracket abuts against the rear side of a swivel fork to push up and rotate the swivel fork.